Page 32 - M1-12 Ops Manual McMurdo 2016
P. 32
B) Logic Input (for models with RS-485 only)
C.1) Relay Outputs
This input is used for remote acknowledgement (reset).
OUT 1 1 Class 1 2
NO - OUT 1 C - OUT 1 NC - OUT 1 C
Safety note:
- Do not run logic input wiring with AC power
cables.
- Use an external dry contact capable of
switching 0.5 mA, 5 Vdc.
- The instrument needs 100 ms to recognize a
3
contact status variation.
- The logic inputs are NOT isolated from the
OUT 2 6 Class 1
(Alarm)
Fig.7
The OUT 1 contact rating is 3A/250V AC on resistive load.
The OUT 2 contact rating is 2A/250V AC on resistive load.
measuring input.
Logic input
NO
14 15
Fig. 8
5
The number rating. NOTES 1)
of operations is 1 x 105 at specified
2)
T o avoid electric shock, connect power line at the end of the wiring procedure. For power connections use No 16 AWG or larger wires rated for at last 75 °C. Use cupper conductors only.
3)
7
4)
All relay contacts are protected by varistor against inductive load with inductive component up to 0.5 A.
Don’t run input wires with power cables.
The following recommendations avoid serious problems which may occur, when relay outputs are used with inductive loads.